O-Ring Weight Calculator
Select material and enter dimensions to calculate
Formula Used
About O-Ring Weight Calculation
Why Weight Matters
O-ring weight is critical for cost estimation, shipping calculations, inventory planning and verifying dimensional accuracy. Even small differences in specific gravity across materials can significantly affect total weight in bulk orders.
ISMAT Material Data
All specific gravity values are drawn from ISMAT's proprietary compound database, developed over 40+ years of compounding expertise. Values are specific to each grade — not generic material-family averages.
Formula Accuracy
The torus volume formula provides accurate theoretical weight. Actual weight may vary ±2–3% due to compound batch variation, mould flash and post-cure shrinkage within standard tolerances.
Need a Custom O-Ring?
Our engineers can design and manufacture O-rings to your exact specifications — from prototype to high-volume production.